Improvement in cultivators



-H'. H. GIBSON.

Improvement in Cultivators.

Patented Oct. 15,1872..

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UNITED STATES PATENT EEIGE.

HENRY H. GIBSON, OF QUINOY, ILLINOIS.

IMPROVEMENT IN CULTIVATORS.

Specification 'formin g part of Letters Patent No. 132,277, datedOctober 15,1872.

Nature and Objects of the Intention.

The invention relates to that class of plows termed cultivators, and isprovided with plowshares, which are capable of both perpendicular andlateral movement, the vertical movement being effected by means of alever projecting above the upper part of the device and operating adouble crank, the ends of which .are connected by chains with the frontextremities of the plow beams, whereby the beams and shares may beelevated. The lateral movement is effected by means of levers, thehandles of which project to the rear of the device and operate slides towhich the rear of the plow-beams are attached, the slides mov -ing upona rod common to both sides of the Description of the Accompanying]Drawing.

Figure I is a side elevation, and Fig. II is a plan view.

General Description.

A in the accompanying drawing represents the wheels which revolve onshort axles projecting outward from the lower angle of thetriangularframes B, which are connected with each other by two rods, Oand D. The rod G connects the upper front angles of the frames B, andserves to furnish a rest for the front extremities of the double crankP, and also affords a means of attaching a tongue, as in the presentinstance, or thills to the device. The rod D connects the upper rearangles of the frames B, and affords a rear attachment for the tongue Eor thills, also as a rear support for the movable seat F, which isprovided on each side with parallel arms a, having suitable recessesabove and below to receive therod D and crank. This seatis placeddirectly in rear of the tongue E, the distance between its arms beingslightly greater than the width of the tongue, that portion of which inthe rear of the rod C is inclosed on two sides by the arms a.' On therod D are placed the sliding blocks H and I, one on each side of theseat F. These lblocks are constructed as follows: If intended to receivethe extremity of but one plow-beam they may be made of the shape of theblock H-that is, having a circular aperture, b, running through itsentire length through which the rod D passes, and by means of which theblock H moves upon the rod D. The block H is provided with a shoulder,c, which, when the block is in position, projects to the rear, and isprovided with a rectangular vertical slot, through which passes theupper rear extremity of the plow-beam N, where it is held in the desiredposition by means of the set-screw d. That part of the block H nearestthe seat F is provided with a circular groove, i, to receive the staplem, which connects it with the lever O. The block I is used when thereare two plow-beams or a plow-beam having two upper rear extremities, andis substantially the same as block H, except that it has the shoulder con each side and a circular groove at its center. made single or doubleand provided with any kind of plow-shares, n, in L and M; also, withrotating sod cutters, asA shown in M. The beams have a rear upward anddownward curve.' The extremity of the former part passes through themortise in the shoulder o of tlre block H or I. The extremity of thelatter curve is provided with a share placed so that its .foot is aproper distance above the plane kof the lower surface of the wheels A.The plow-beam N has an upward curve in front, that extremity having anaperture and link, o, through which passes one end of a chain, p, theother end of the chain being secured to the front extremity of thedouble crank I).`

The lever O is connected by means of the staple m with the block H orvI, and projects forwardin about the same horizontal plane as the tongueE, its front extremity having a metal plate with a horizontal slot, s,which passes over the neck t in the double crank P. The frontextremities of the double crank Pl rest upon the upper surface of therod C at points about eqnidistant from the tongue E.

The plow-beams L M may be A short distance in rear of the bar C thecrank P is provided with a loop to receive the upper end of the chain p.The center of the crank passes through the tongue E, on each side ofwhich is placed the neck t, and is provided with avertical lever, R, thelower part of which is open and secured on each side of the tongue E tothe crank P in such position that when the lever R is forced backwardand downward the front extremities of the double crank P are elevated.

Operation.

The propelling power being attached and the machine in motion, when itis desired to widen 'the distance between the furrows the handle ofthelever() is moved respectively toward the nearest frame B. A contrarymovement serves to widen the distance between the furrows, as in eithercase the levers 0 swinging laterally upon the double crank P, whenoperated, move the block I-I or I, to which the plow-beam is attached,thus causing the shares on the lower end of the plow-beam to move in adifferent line. When it is desired to lessen the depth ofthe furrow ort'urrows the lever R is drawn back, thus turning the crank P in asimilar direction and elevating its front extremities, to which areattached the chains p, having their lower ends secured to the front partof the plow-beams. Thus, by elevating the front parts of the cranks, thechains are drawn taut and the beams and shares elevated.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The blocks H and I provided 'with the shoulders c and set-screw d,for the uses and

